Schaghticoke Fm., earliest Tremadoc (Ordovician of the United States)

Where: Rensselear County, New York (42.6° N, 73.6° W: paleocoordinates 32.3° S, 68.4° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Schaghticoke Formation, Tremadoc (485.4 - 477.7 Ma)

• "earliest Tremadoc"

Environment/lithology: deep-water; black, green shale

• "black shale with interbedded green sh and layers of qtzite (1/4-1/2" thick). deepwater (BA6)"

Size class: macrofossils

Primary reference: R. Ruedemann. 1934. Paleozoic plankton of North America. Geological Society of America Memoirs 2:1-141 [M. Uhen/J. Ju/J. Ju]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 272: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "R.Rudeman, 1934. Paleozoic plankton of North America. GSA Mem.2 141p."
 Hyolithida - Hyolithidae
Hyolithes sp. d'Eichwald 1840
 Acrotretida - Acrotretidae
Acrotreta sp. Kutorga 1848
 Lingulida - Paterulidae
Paterula sp. Barrande 1879
 Sabellida - Serpulidae
Spirorbis sp. Daudin 1800
 Serpulimorpha -
 Dendroidea -
 Dendroidea - Dendrograptidae
Dictyonema sp. Hall 1851 graptolite
originally entered as "Dictyomena sp."
 Reticulosa -
Megastylia sp. glass sponge
 Reticulosa - Protospongiidae
Palaeosaccus sp. glass sponge